Two geoglyphs that are truly unique to North America.

More than 25 fully functional scale replicas of famous lighthouses dot the shores of Lake Havasu.

This iconic 1958 tower welcomes air travelers to Tucson with neon-lit letters and architectural style.

Visitors to this public park will also find the ruins of an old western fort.

The first steel dam in the world and the only one still functional in the United States.

This small interfaith chapel lies not far from the rim of the Grand Canyon.

Red sandstone structures dominate this landscape, which has been inhabited for some 5,000 years.

This Native American settlement dates back to the Pueblo II period.

Originally conceived as part of a proposed Arizona State Capitol building in the 1950s, this structure built in 2004 stands as a monument to the architect's legacy.

A rare wayfinding portmanteau of “Street” and “Avenue.”

A strenuous, unofficial trail leads to spectacular views in one of America's most remote national monuments.

Arizona's first government hub is a rustic cabin now preserved as part of a historical museum.

A towering bronze statue memorializes the founding father of postwar American conservatism.

When it was built in 1929, this historic bridge was the only place to cross the Colorado River for 600 miles.

Petroglyphs, bird watching, and a 100-year-old Ranch in one location.

The remnants of a creative early method of wildfire prevention.

These elusive, isolated rodents evolved into a distinct, locally iconic subspecies.

Some 10,000 works of ancient rock art cover these volcanic basalt outcrops near the Gila River.

A mistaken marker makes an erroneous claim along the historic Old Divide Road.

Inside this garden, visitors are offered a glimpse into how inhabitants of the region survived centuries ago.

This isolated outpost was once the only place to cross the Colorado River for hundreds of miles.

This quiet chapel was central to a community of settlers who reclaimed an abandoned fort.

After a short-lived attempt to bring America in line with the rest of the world, this road was left in metric.

These mid-century motels once housed the workers who built the Glen Canyon Dam.